• Title/Summary/Keyword: Contents Transmission

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Performance Evaluation by Frame Discard Methods in Adaptive Bandwidth Allocation Technique for Transmission Plan of Game Moving Picture (게임 동영상 전송을 위한 적응형 대역폭 방법에서 프레임 폐기 방법에 의한 성능 평가)

  • Lee, Myoun-Jae;Kim, Tae-Eun
    • Journal of Digital Contents Society
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    • v.9 no.3
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    • pp.433-439
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    • 2008
  • A moving picture in online game is one of major ways to advertise online games, which gives a lot of help in playing game. In this case, a moving picture is compressed to variable bit rate for efficient storage use and network resource efficiency. Adaptable bandwidth allocation technique builds a transmission plan of a game moving picture. And, then some frames are discarded when transmission rate by the transmission plan is larger than available transmission rate, until transmission rate satisfies available transmission rate. Thus, performance evaluation factors in adaptable bandwidth allocation technique may be dependent on discarding order of a frame which transmission rate is much influenced. In this paper, in order to show the performance, a CBA algorithm, an MCBA algorithm, an MVBA algorithm, [6] and [7] algorithm were applied to a transmission plan in the adaptable band width allocation technique using various frame discard methods and performance evaluation factors were compared in among smoothing algorithms.

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Development of 60 GHz Band Transceiver System for Multimedia Contents Transmission (멀티미디어 콘텐츠 전송용 60 GHz대 송수신 시스템 개발)

  • Cho, Jine-Yeon;Kim, Chang-Il;Kim, Nam-Soo
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.15 no.2
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    • pp.57-63
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    • 2015
  • There are increasing demands for the transmission of high speed and non-compressed video informations. The video data usually compressed before transmission for reducing the data. And the received data uncompressed at a receiver, consequently the processing delay is unavoided. In this paper, we implement a 60 GHz band wireless transmission system for real time multimedia contents transmission, and successfully transmit the full HD class uncompressed video information at 4 Gbps with 20 m apart. Hence the non-compressed video data from a remote camera or a smart phone can be transmitted and displayed in a large screen in real time via the developed transceiver system.

Data Transmission Processing System Design for Real-Time Distributed Simulation by Using Software Design Patterns (소프트웨어 디자인 패턴을 적용한 실시간 분산 시뮬레이션을 위한 데이터 전달처리 시스템 설계)

  • Suk, Jin-Weon;Ryoo, In-Tae
    • Journal of Digital Contents Society
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    • v.10 no.4
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    • pp.649-657
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    • 2009
  • Usually, The data transmission processing efficiency of the distributed system running on high speed networks depends on the system architecture and the data transmission processing system. In order to secure the real-time rate and the system reliability, the real-time distributed simulation system on the distributed environment has tried to satisfy the performance required by the data transmission processing system. However, the client/server-based data transmission processing system in the real-time simulation system has been difficult to satisfy the system stability, extensibility and maintenability, especially when system changes. So, it is natural to study another improved data transmission processing system to solve the problems at the existing real-time simulation system. After analyzing the existing real-time simulation system, this paper will propose the improved real-time data transmission system by using Software Design Pattern, which enhances extensibility, interoperability, reusability and maintenability of the system.

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Transmission Rate Priority-based Traffic Control for Contents Streaming in Wireless Sensor Networks (무선 센서 네트워크에서 콘텐츠 스트리밍을 위한 전송율 우선순위 기반 트래픽제어)

  • Lee, Chong-Deuk
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.12 no.7
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    • pp.3176-3183
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    • 2011
  • Traffic and congestion control in the wireless sensor network is an important parameter that decides the throughput and QoS (Quality of Service). This paper proposes a transmission rate priority-based traffic control scheme to serve digital contents streaming in wireless sensor networks. In this paper, priority for transmission rate decides on the real-time traffic and non-real-time with burst time and length. This transmission rate-based priority creates low latency and high reliability so that traffic can be efficiently controlled when needed. Traffic control in this paper performs the service differentiation via traffic detection process, traffic notification process and traffic adjustment. The simulation results show that the proposed scheme achieves improved performance in delay rate, packet loss rate and throughput compared with those of other existing CCF and WCA.

A Study on the Air pollution Information transmission method using TPEG (TPEG을 이용한 대기오염 정보 전송 방안 연구)

  • Lee, SangWoon
    • Journal of Digital Contents Society
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    • v.14 no.4
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    • pp.521-528
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    • 2013
  • Recently the increasing numbers of cars and traffic jamming makes air pollution condition more severely. Especially high-density population area, in most big cities like Bejing and Seoul, can lead to lung illness and other diseases. In this study to decrease this kind of air pollution condition, a method of air pollution information transmission is proposed. For the transmission of air pollution and traffic control data, international standard technology, the TPEG is applied.

A Study on the Performance of H.264/AVC with FEC in Wireless Internet Environment (무선인터넷 환경에서 FEC를 적용한 H.264/AVC의 성능에 관한 연구)

  • Lee, Sang-Heon;Kang, Heau-Jo
    • Journal of Digital Contents Society
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    • v.7 no.4
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    • pp.251-256
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    • 2006
  • In this paper, We proposed joint-modulation CDMA system for efficient streaming transmission. and, We analyzed joint-modulation CDMA system using nakagami fading model and impulsive interference model for transmission channel environment. Also, it can being compensate the performance degradation by using MRC diversity scheme and BCH coding scheme.

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Development of communication module for the wireless transmission of oxygen saturation(SpO2) and display software (산소 포화도의 무선 전송을 위한 통신모듈 및 디스플레이 소프트웨어 개발)

  • Han, Young-Oh
    • Journal of Digital Contents Society
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    • v.11 no.2
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    • pp.277-282
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    • 2010
  • In this paper, the wireless transmission module is developed to transmit oxygen saturation(SpO2) signal, acquired from bio-signal measuring module, to PC. This wireless transmission module is designed with closed type protocol instead of open type protocol such as a zigbee or a bluetooth, considering of the security of personal medical informations. The display software is also developed to display transmitted SpO2 signals by various type data and graph without information loss for a emergency transfer.

Analysis and Design of Low Pass Filter using Unit Cell based on CRLH Transmission Line

  • Yang, Lei;Yang, Doo-Yeong
    • International Journal of Contents
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    • v.8 no.3
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    • pp.100-104
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    • 2012
  • In this paper, a unit cell for low pass filter design by using composite right and left-handed transmission line in conductor-backed coplanar waveguide is proposed. The characteristics of the unit cell are analyzed in order to design a low pass filter in small sizes. By changing the sizes of the unit cell, the parameters of right-handed and left-handed immittance components are changed and the desired characteristics of the unit cell are achieved. The equivalent circuit of the unit cell is extracted and analyzed either. As a result, the simulation results of the unit cell and the equivalent circuit are almost identified. The movement and energy distributions of electromagnetic field are shown to confirm the property of the unit cell. In the end, a low pass filter is demonstrated by cascading three proposed unit cells, which shows cutoff frequency of 1.53GHz and deep attenuation from 2.23GHz to 4.49GHz lower than -50dB.

Fabrication of Electrically Switchable Bragg Gratings of The Transmission Mode From Holographic Polymer Dispersed Liquid Crystals

  • Kim, Kyung-Jin;Kim, Byung-Kyu;Kang, Young-Soo;Jang, Ju-Seog
    • KIEE International Transactions on Electrophysics and Applications
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    • v.11C no.3
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    • pp.63-69
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    • 2001
  • Holographic transmission gratings were performed by an Ar-laser( ${\lambda}$=514nm) intensity, the ratio fo LC contents to the surfactant. The addition of the surfactant to the LC and pre-polymer systems causes the droplet to maintain the ideal size at the high fraction(over 40wt%) of the LC contents that induce the films to be fabricated with high diffraction efficiency than that of no surfactant series. The image of these films was examined using a charge coupled device (CCD). We also studied the angular selectivity plots which support the important role in the multiplexer channel (MUX). Eventually, we showed the reconstructive optical image recorded in this transmission mode of HPDLCs.

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Enhanced Smoothing Algorithm Using GOP Unit (개선된 GOP 단위의 스무딩 알고리즘)

  • Lee, Myoun-Jae
    • Journal of Digital Contents Society
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    • v.12 no.4
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    • pp.485-490
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    • 2011
  • Smoothing is a transmission plan where variable rate video data is converted to a constant bit rate stream. These smoothing algorithms include CBA, MCBA, MVBA, PCRTT and others. But, these algorithms build a transmission plan per frame unit. So, these algorithms cause frame burst or GOP burst. In order to improve it, MVBAG algorithm build a transmission plan per GOP. But this algorithm may not guarantee QoS when frame's size is abruptly larger or smaller than the computed transmission rate. In this paper, a smoothing algorithm is proposed to enhance MVBAG algorithm's problem. In order to show the proposed algorithm's performance, the proposed algorithm is compared with MVBAG algorithm using various evaluation factors such as number of frames that do not meet the QoS, average transmission rate variability per frame, average transmission rate variability per GOP. Experimental results show that the proposed algorithm outperforms MVBAG algorithm in number of frames that do not meet the QoS.